The Planets

12345678
Across
  1. 2. What is the smallest planet in the Solar System?
  2. 5. What gas gives Uranus and Neptune their blue color?
  3. 6. What is the largest planet in the Solar System?
  4. 7. What is the term for a planet’s path around the Sun?
  5. 8. What is the “Red Planet”?
Down
  1. 1. What gas causes Venus’s extreme greenhouse effect?
  2. 3. What are planets like Jupiter and Saturn called?
  3. 4. What type of planets are Mercury, Venus, Earth, and Mars?